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Topics: NASA Technical Reports Server (NTRS), Camp, Jordan, Leonhardt, Volker

The indirect effects on the geoid computation due to the second method of Helmert's condensation were studied. when Helmert's anomalies are used in Stokes's equation, there are three types of corrections to the free air geoid. The first correction, the indirect effect on geoid undulation due to the potential change in Helmert's reduction, had a maximum value of 0.51 meters in the test area covering the United States. The second correction, the attraction change effect on geoid undulation, had a...
Topics: NASA Technical Reports Server (NTRS), ANOMALIES, GEOIDS, GRAVIMETRY, GEOCENTRIC COORDINATES,...

The present invention relates to a method of detecting phycocyanin algae or bacteria in water from reflected light, and also includes devices for the measurement, calculation and transmission of data relating to that method.
Topics: NASA Technical Reports Server (NTRS), BLUE GREEN ALGAE, BACTERIA, PIGMENTS, REFLECTED WAVES,...

Newer engines use compressor bleed air and a model to close clearances open loop. Measuring clearances and closing the control loop can add additional efficiencies. Tip clearance control has been identified as a key technology for future engines Additional benefits in prognostics, NSMS, and condition-based maintenance. In the HPT for every 1 mil improvement in clearance: a) SFC decreases 0.1%; and b) EGT margin increases 1 C.
Topics: NASA Technical Reports Server (NTRS), BLADE TIPS, CLEARANCES, COMPRESSORS, EFFICIENCY, MAINTENANCE,...

A method that involves the use of fictitious plate elements denoted b ridge plates has been developed for representing the stiffnesses of fillets in finiteelement calculations of deflections, stresses, and strains in structures. The bridge plates of the present method are re duced-order models of fillets that do not yield accurate stresses wi thin fillets but do make it possible to accurately calculate the dyna mic characteristics of the structure and to approximate the effects of fillets on...
Topics: NASA Technical Reports Server (NTRS), FILLETS, FINITE ELEMENT METHOD, APPROXIMATION, MATHEMATICAL...

This bibliography lists 442 reports, articles, and other documents introduced into the NASA scientific and technical system in February 1982.
Topics: NASA Technical Reports Server (NTRS), AERODYNAMICS, AERONAUTICAL ENGINEERING, AERONAUTICS, AIRCRAFT...

This viewgraph presentation reviews the challenges for the pulsed laser in the following categories: 1. Metal 2. Package 3. Scaling 4. Exotic materials 5. Novel devices 6. Equipment
Topics: NASA Technical Reports Server (NTRS), PULSED LASERS, ION BEAMS, SINGLE EVENT UPSETS, Buchner,...

This document is an environmental assessment that examines the environmental impacts of a proposed plan to clear land and to construct a building for the operation of a Visitor/Education Center at a location next to the Mississippi Welcome Center on Interstate 10 along highway 607 in Hancock County Mississippi.
Topics: NASA Technical Reports Server (NTRS), CONSTRUCTION, BUILDINGS, EDUCATION, ENVIRONMENTS, HIGHWAYS,...

Propulsion 21 technologies contribute to reducing CO2 and NO(x) emissions and noise. Integrated Government/Industry/University research efforts have produced promising initial technical results. Graduate students from 5 partnering universities will benefit from this collaborative research--> educating the future engineering workforce. Phase 2 Efforts scheduled to be completed 3QFY06.
Topics: NASA Technical Reports Server (NTRS), CARBON DIOXIDE, PROPULSION, INDUSTRIES, STUDENTS,...

Harold Morton introduced a talk by saying that when you wind up an old professor, he tends to talk for a microcentury. I will attempt to keep my comments to that canonical time span. Having failed to find some unifying theme for this talk, I decided to just ramble through my career with a focus on the algorithms, spacecraft, and people I've had the privilege and pleasure to work with. The algorithms, and certainly the spacecraft, are not all mine. The people are some of those whose ideas that...
Topics: NASA Technical Reports Server (NTRS), ALGORITHMS, PROBLEM SOLVING, OCCUPATION, READERS, Markley, F....

The results of a program to demonstrate the feasibility of a low angle silicon ribbon growth process are described. Twenty-six experimental runs were performed. Ribbons were grown at pull rates from 5 to 68 cm/min. Ribbon lengths up to 74 cm were grown while widths varied from 5 to 25 mm. Thicknesses varied from 0.6 to 2.5 mm, with typical values of about 1 mm.
Topics: NASA Technical Reports Server (NTRS), CRYSTAL GROWTH, RIBBONS, SILICON, DESIGN ANALYSIS, EQUIPMENT...

An improved method has been devised for fabricating micron-dimension Li features. This approach is intended for application in the fabrication of lithium-based microelectrochemical devices -- particularly solid-state thin-film lithium microbatteries.
Topics: NASA Technical Reports Server (NTRS), FABRICATION, LITHIUM BATTERIES, STORAGE BATTERIES, THIN...

This report presents an elementary analysis of the induced velocity created by a field of vortices that reside in the wake of a rotor blade. Progress achieved by other researchers in the last 70 years is briefly reviewed. The present work is presented in four stages of complexity that carry a lifting-line representation of a fixed wing into a single-blade rotor. The analysis leads to the conclusion that the lifting rotor's spiraling vortex wake structure has very high induced power when...
Topics: NASA Technical Reports Server (NTRS), LIFTING ROTORS, VELOCITY DISTRIBUTION, FIXED WINGS, WAKES,...

This paper examines the opportunities and threats which arise when turning origin/destination airports into hubs. The analysis focuses on market development trends, competitive structures, especially in the light of airline network strategies and the growing rivalry between airports, and finally the potential financial impacts for the airport, including both investment efforts and the financial results from hub operations. We argue that in most cases a decision against converting a traditional...
Topics: NASA Technical Reports Server (NTRS), AIRLINE OPERATIONS, AIRPORTS, HUBS, TRENDS, Kraus, Andreas,...

The development of the MOD-2 wind turbine through acceptance testing and initial operational evaluation is documented. Pitch control hydraulic system, yaw control system, drive train, electrical power station, control system, operations and maintenance experience, and availability are discussed.
Topics: NASA Technical Reports Server (NTRS), HYDRAULIC EQUIPMENT, PITCH (INCLINATION), WIND TURBINES,...

This bibliography lists 254 reports, articles, and other documents introduced into the NASA scientific and technical information system in December 1981.
Topics: NASA Technical Reports Server (NTRS), AERODYNAMICS, AERONAUTICAL ENGINEERING, ABSTRACTS, AIRCRAFT...

Entries for 4000 patents and patent applications citations for the period May 1969 through June 1982 are listed. Subject, invention, source, number and accession number indexes are included.
Topics: NASA Technical Reports Server (NTRS), NASA PROGRAMS, PATENT POLICY, INDEXES (DOCUMENTATION),...

This document is a series of flowcharts that reviews the process for solicitation and selection of candidates for human systems tests.
Topics: NASA Technical Reports Server (NTRS), SELECTION, EVALUATION, HUMAN BEINGS, CERTIFICATION, Labuda,...

One of the most interesting and challenging aspects of formation guidance law design is the coupling of the orbit design and the science return. The analyst's role is more complicated than simply to design the formation geometry and evolution. He or she is also involved in designing a significant portion of the science instrument itself. The effectiveness of the formation as a science instrument is intimately coupled with the relative geometry and evolution of the collection of spacecraft....
Topics: NASA Technical Reports Server (NTRS), SPACECRAFT GUIDANCE, ALGORITHMS, LISA (OBSERVATORY), COSTS,...

Four possible estimators are investigated for the monitoring of crustal deformations from a combination of repeated baseline length measurements and adopted geophysical models, particularly an absolute motion plate model. The first estimator is an extension of the familiar free adjustment. The next two are Bayesian type estimators, one weak and one strong. Finally, a weighted constraint estimator is presented. The properties of these four estimators are outlined and their physical...
Topics: NASA Technical Reports Server (NTRS), DEFORMATION, EARTH CRUST, GEOPHYSICS, MATHEMATICAL MODELS,...

Incombustible resin compositions composed of aromatic compounds were obtained through (1) combustion polymer material and (2) bisphenol A or halogenated bisphenol A and bisphenol A diglycidl ether or halogenated bisphenol A diglycidyl ether. The aromatic compound is an adduct of bifunctional phenols and bifunctional epoxy resins.
Topics: NASA Technical Reports Server (NTRS), BISPHENOLS, POLYMER PHYSICS, RESINS, COMBUSTION PHYSICS,...

This bibliography lists 511 reports, articles and other documents introduced into the NASA scientific and technical information system in October 1982.
Topics: NASA Technical Reports Server (NTRS), AERODYNAMICS, AERONAUTICAL ENGINEERING, AERONAUTICS, AIRCRAFT...

Copper is the most widely used electrical conductor. Like most metals, though, it has several drawbacks: it is heavy, expensive, and can break. Fibers that conduct electricity could be the solutions to these problems, and they are of great interest to NASA. Conductive fibers provide lightweight alternatives to heavy copper wiring in a variety of settings, including aerospace, where weight is always a chief concern. This is an area where NASA is always seeking improved materials. The fibers are...
Topics: NASA Technical Reports Server (NTRS), ELECTRICAL RESISTIVITY, TEXTILES, WIRING, CONDUCTORS, COPPER,...

Topics: NASA Technical Reports Server (NTRS), ASTRONAUTS, BIOGRAPHY, AIRCRAFT PILOTS, SCIENTISTS, SPACE...

An optical profile determining apparatus includes an optical detector and an optical source. The optical source generates a transmit beam including a plurality of wavelengths, and generates a reference beam including the plurality of wavelengths. Optical elements direct the transmit beam to a target, direct a resulting reflected transmit beam back from the target to the optical detector, and combine the reference beam with the reflected transmit beam so that a profile of the target is based...
Topics: NASA Technical Reports Server (NTRS), OPTICAL PROPERTIES, TARGETS, PATENTS, Montgomery, Robert M....

Test data shows that different width and thickness C(T), M(T) and ESE(T) specimens generate different thresholds Structures designed for "infinite life" are being re-evaluated: a) Threshold changes from 6 to 3 ksi in(sup 1/2); b) Computational life changes from infinite to 4 missions. Multi-million dollar test programs required to substantiate operation. Using ASTM E647 as standard guidance to generate threshold data is not practical. A threshold test approach needs to be standardized...
Topics: NASA Technical Reports Server (NTRS), FATIGUE (MATERIALS), CRACK PROPAGATION, THICKNESS,...

A microencapsulation apparatus is provided which is configured to form co-axial multi-lamellar microcapsules from materials discharged from first and second microsphere dispensers of the apparatus. A method of fabricating and processing microcapsules is also provided which includes forming distinct droplets comprising one or more materials and introducing the droplets directly into a solution bath to form a membrane around the droplets such that a plurality of microcapsules are formed. A...
Topics: NASA Technical Reports Server (NTRS), DISPENSERS, MICROPARTICLES, MEMBRANES, PATENTS, Morrison,...

An algorithm and a computer program that implements the algorithm that performs recursive hierarchical segmentation (RHSEG) of data have been developed. While the current implementation is for two-dimensional data having spatial characteristics (e.g., image, spectral, or spectral-image data), the generalized algorithm also applies to three-dimensional or higher dimensional data and also to data with no spatial characteristics. The algorithm and software are modified versions of a prior RHSEG...
Topics: NASA Technical Reports Server (NTRS), ALGORITHMS, DATA SYSTEMS, RECURSIVE FUNCTIONS, COMPUTER...

This viewgraph presentation reviews the characterization of radiometric data by NASA. The objective was to perform radiometric vicarious calibrations of imagery and compare with vendor-provided calibration coefficients. The approach was to use multiple, well-characterized sites. These sites are widely used by the NASA science community for radiometric characterization of airborne and space borne sensors. Using the data from these sites, the investigators performed independent characterizations...
Topics: NASA Technical Reports Server (NTRS), CALIBRATING, DATA PROCESSING, RADIOMETERS, AIRBORNE...

A document presents equations for scoring rules in a diagnostic and/or prognostic artificial-intelligence software system of the rule-based inference-engine type. The equations define a set of metrics that characterize the evaluation of a rule when data required for the antecedence clause(s) of the rule are missing. The metrics include a primary measure denoted the rule completeness metric (RCM) plus a number of subsidiary measures that contribute to the RCM. The RCM is derived from an analysis...
Topics: NASA Technical Reports Server (NTRS), ARTIFICIAL INTELLIGENCE, INFERENCE, SCORING, EQUATIONS,...

A method of evolving a circuit uses a heterogenous mix of models of both high and low levels of resolution.
Topics: NASA Technical Reports Server (NTRS), CIRCUITS, HIGH RESOLUTION, PATENTS, Stoica, Adrian [Inventor]

Single integral representations for the resistive and reactive components of the radiation impedance appropriate to a rectangular piston are established, thereby enabling a systematic refinement of estimates at both short and long wave lengths. Comparisons with previous analyses are made explicit as well as extensions and corrections thereto.
Topics: NASA Technical Reports Server (NTRS), IMPEDANCE MEASUREMENT, PISTONS, WAVELENGTHS, DATA...

Accutron Tool & Instrument Co.'s wheelchair was designed to increase mobility within the airplane. Utilizing NASA's structural analysis and materials engineering technologies, it allows passage through narrow airline aisles to move passengers to their seats and give access to lavatories. Stable, durable, comfortable and easy to handle, it's made of composite materials weighing only 17 pounds, yet is able to support a 200 pound person. Folded easily and stored when not in use.
Topics: NASA Technical Reports Server (NTRS), WHEELCHAIRS, CIVIL AVIATION, STRUCTURAL ANALYSIS, AIRLINE...

There are 16,713 postable terms and 3,716 nonpostable terms approved for use in the NASA scientific and technical information system in the Hierarchical Listing of the NASA Thesaurus. The generic structure is presented for many terms. The broader term and narrower term relationships are shown in an indented fashion that illustrates the generic structure better than the more widely used BT and NT listings. Related terms are generously applied, thus enhancing the usefulness of the Hierarchical...
Topics: NASA Technical Reports Server (NTRS), INDEXES (DOCUMENTATION), INFORMATION RETRIEVAL, TERMINOLOGY,...

The space station concept was studied, and the program was defined. The project planning efforts are described.
Topics: NASA Technical Reports Server (NTRS), PROJECT PLANNING, SPACE STATIONS, MANAGEMENT PLANNING, SPACE...

This bibliography lists 512 reports, articles and other documents introduced into the NASA scientific and technical information system in April 1982.
Topics: NASA Technical Reports Server (NTRS), AERODYNAMICS, AERONAUTICAL ENGINEERING, AERONAUTICS, AIRCRAFT...

The Access Vocabulary, which is essentially a permuted index, provides access to any word or number in authorized postable and nonpostable terms. Additional entries include postable and nonpostable terms, other word entries, and pseudo-multiword terms that are permutations of words that contain words within words. The Access Vocabulary contains, 40,661 entries that give increased access to he hierarchies in Volume 1 - Hierarchical Listing.
Topics: NASA Technical Reports Server (NTRS), INDEXES (DOCUMENTATION), INFORMATION RETRIEVAL, TERMINOLOGY,...

Large birds and glider pilots commonly use updrafts caused by convection in the lower atmosphere to extend flight duration, increase cross-country speed, improve range, or simply to conserve energy. Uninhabited air vehicles may also have the ability to exploit updrafts to improve performance. An updraft model was developed at NASA Dryden Flight Research Center (Edwards, California) to investigate the use of convective lift for uninhabited air vehicles in desert regions. Balloon and surface...
Topics: NASA Technical Reports Server (NTRS), VERTICAL AIR CURRENTS, COMPUTER PROGRAMS, GLIDERS,...

California Measurements, Inc.'s model PC-2 Aerosol Particle Analyzer is produced in both airborne and ground-use versions. Originating from NASA technology, it is a quick and accurate method of detecting minute amounts of mass loadings on a quartz crystal -- offers utility as highly sensitive detector of fine particles suspended in air. When combined with suitable air delivery system, it provides immediate information on the size distribution and mass concentrations of aerosols. William Chiang,...
Topics: NASA Technical Reports Server (NTRS), AEROSOLS, PARTICLES, AIR POLLUTION, HEALTH PHYSICS,...

The investigation of the performance limiting mechanisms in large grain (greater than 1-2 mm in diameter) polycrystalline silicon was continued by fabricating a set of minicell wafers on a selection of 10 cm x 10 cm wafers. A minicell wafer consists of an array of small (approximately 0.2 sq cm in area) photodiodes which are isolated from one another by a mesa structure. The junction capacitance of each minicell was used to obtain the dopant concentration, and therefore the resistivity, as a...
Topics: NASA Technical Reports Server (NTRS), PHOTODIODES, POLYCRYSTALS, SILICON, CAPACITANCE, WAFERS,...

This slide presentation reviews NASA's use of a new super computer, called Columbia, capable of operating at 62 Tera Flops. This computer is the 4th fastest computer in the world. This computer will serve all mission directorates. The applications that it would serve are: aerospace analysis and design, propulsion subsystem analysis, climate modeling, hurricane prediction and astrophysics and cosmology.
Topics: NASA Technical Reports Server (NTRS), NASA PROGRAMS, SUPERCOMPUTERS, APPLICATIONS PROGRAMS...

A stability study of rotor/bearing systems is presented. Even though it was limited to study of a fully lubricated bearing subject to oil whirl, and further limited to low eccentricity region for linearity and with only one type of lubricant, it can be seen that the perturbation methodology, together with the sorting of the impedance terms into direct and quadrature with respect to input force can be very useful to the general study of stability. Further, the concept of active feedback should...
Topics: NASA Technical Reports Server (NTRS), BEARINGS, IMPEDANCE, PERTURBATION, ECCENTRICITY, FEEDBACK,...

This paper is a tribute to Dr Fred Munpton, the founder of the International Committee on Natural Zeolites (ICNZ), by one of his students, who later succeed him as president of the ICNZ. The tribute reflects on Dr. Mumpton's skills as an editor and his zeal for the study of natural zeolites.
Topics: NASA Technical Reports Server (NTRS), ZEOLITES, TECHNICAL WRITING, EDITING, Ming, Douglas W.

A formal procedure for the probabilistic design evaluation of a composite structure is described. The uncertainties in all aspects of a composite structure (constituent material properties, fabrication variables, structural geometry, and service environments, etc.), which result in the uncertain behavior in the composite structural responses, are included in the evaluation. The probabilistic evaluation consists of: (1) design criteria, (2) modeling of composite structures and uncertainties, (3)...
Topics: NASA Technical Reports Server (NTRS), STRUCTURAL DESIGN, COMPOSITE STRUCTURES, DESIGN ANALYSIS,...

We affirm the principle that a viable human space exploration program must be conducted hand-in-hand with a comprehensive scientific research program that incorporates both the physical and life sciences and that continues to protect and extend understanding of our home planet. Without advances in life science, we will be incapable of devising self-sustaining extraterrestrial habitats, and we will struggle to survive on the only living planet we know. Without advances in the physical sciences,...
Topics: NASA Technical Reports Server (NTRS), LIFE SCIENCES, SPACE EXPLORATION, HABITATS, PHYSICAL...

Humans are restless explorers. For 99% of humanity s time on Earth, we have been nomadic wanderers, not farmers, warriors, factory workers, developers, or NASA employees. Only recently--for only a few thousand years--have most humans been tied to the land as many are now. But as more and more of us live in information societies and some indeed in dream societies where our identity derives from the knowledge we share and the image we project, and not from the property we own or the manual work...
Topics: NASA Technical Reports Server (NTRS), SPACE EXPLORATION, DUCTILITY, EXPLOITATION, HAZARDS,...

Included are citations for formal reports, quick-release technical memorandums, contractor reports, journal articles and periodical literature, meeting/conference papers, and computer programs. Tech briefs, patents, and oral presentations to conferences/workshops are also included.
Topics: NASA Technical Reports Server (NTRS), DOCUMENTATION, RESEARCH FACILITIES, INDEXES (DOCUMENTATION),...

A method and apparatus for electronically performing a visual field test for a patient. A visual field test pattern is displayed to the patient on an electronic display device and the patient's responses to the visual field test pattern are recorded. A visual field representation is generated from the patient's responses. The visual field representation is then used as an input into a variety of automated diagnostic processes. In one process, the visual field representation is used to generate...
Topics: NASA Technical Reports Server (NTRS), DEFECTS, FIELD TESTS, PATIENTS, VISUAL FIELDS, PATENTS, Fink,...

ICE: The Nature, the History, and the Uses of an Astonishing Substance is a recently published book by Mariana Gosnell about ice. It covers not just the ice that is readily seen, such as sea ice, lake ice, icebergs, glaciers, ice sheets, and ice cubes, but also ice in the ground, in the atmosphere, inside plants and animals, and in outer space, plus new ice forms being created in scientific laboratories. Gosnell treats the reader to a well-written, easy-going mixture of science, adventure,...
Topics: NASA Technical Reports Server (NTRS), FREEZING, ICE, GLOBAL WARMING, REVIEWING, Parkinson, Claire L.

After a historical review of the theory of the Earth's magnetism, the author indicates how the theory may be improved and gives results of his own calculations for the Epoch 1842.
Topics: NASA Technical Reports Server (NTRS), GAUSS EQUATION, GEOMAGNETISM, TIME MEASUREMENT, COMPUTATION,...

The reduction of NICMOS observations in the Hubble Ultra Deep Field required unique reduction and calibration techniques, not required for images containing brighter sources. This paper describes some of these techniques which may be useful in the reduction of other fields containing extremely faint sources. These techniques apply to NICMOS camera 3 which was the only NICMOS camera utilized in the observations. The absolute accuracy of the NICMOS camera 3 photometry was also investigated using...
Topics: NASA Technical Reports Server (NTRS), CALIBRATING, PHOTOMETRY, CAMERAS, ACCURACY, BRIGHTNESS,...

This viewgraph presentation reviews some of the issues that are impacting NASA and discusses ways to improve the organizational culture in the agency.
Topics: NASA Technical Reports Server (NTRS), LEADERSHIP, MORALE, MOTIVATION, PSYCHOLOGY, PERSONNEL...

This document is a transcript for a video about a practice practiced at Goddard Space Flight Center called Pause and Learn (PaL). The PaL process is intended to, first of all, help the team learn. So, the team that was involved in the activity, the group that actually did the work, that handled the review, or ran the tests, or developed the piece of equipment, they sit down and actually say, "What did we learn from this exercise?" The idea is to create a learning environment at...
Topics: NASA Technical Reports Server (NTRS), TEAMS, PROJECTS, LEARNING, PROJECT PLANNING, TRAINING...

The Council on Aviation Accreditation (CAA) was established in 1988 in response to the need for formal, specialized accreditation of aviation academic programs, as expressed by institutional members of the University Aviation Association (UAA). The first aviation programs were accredited by the CAA in 1992, and today, the CAA lists 60 accredited programs at 21 institutions nationwide. Although the number of accredited programs has steadily grown, there are currently only 20 percent of UAA...
Topics: NASA Technical Reports Server (NTRS), EDUCATION, ON-LINE SYSTEMS, AERONAUTICS, SURVEYS, HISTORIES,...

An electrical connector assembly includes a wire bundle having at least one wire with a metal shield surrounding at least a portion of the wire. The shield has an end portion and provides electromagnetic interference protection to the wire. A backshell includes a body and a cover secured to the body together defining an internal cavity with the wire at least partially arranged within the cavity. The backshell provides EMI protection for the portion of the wire bundle not covered by the shield....
Topics: NASA Technical Reports Server (NTRS), BUNDLES, ELECTRIC CONNECTORS, MINIATURIZATION, WIRE, PATENTS,...

This bibliography lists 272 reports, articles and other documents introduced into the NASA scientific and technical information system in November 1982.
Topics: NASA Technical Reports Server (NTRS), AERODYNAMICS, AERONAUTICAL ENGINEERING, AERONAUTICS, AIRCRAFT...

The results of a Space Transportation System ascent trajectory dispersion analysis are documented. Critical trajectory parameter values useful for the definition of lightweight external tank insulation requirements are provided. This analysis was conducted using two of the critical missions specified for the Space Transportation System: a 28.5 deg inclination trajectory launched from the Eastern Test Range (ETR) and a Western Test Range (WTR) trajectory launched into a 104 deg orbital...
Topics: NASA Technical Reports Server (NTRS), ASCENT TRAJECTORIES, DISPERSIONS, EXTERNAL TANKS, PARAMETER...

An error response test system and method with increased functionality and improved performance is provided. The error response test system provides the ability to inject errors into the application under test to test the error response of the application under test in an automated and efficient manner. The error response system injects errors into the application through a test mask variable. The test mask variable is added to the application under test. During normal operation, the test mask...
Topics: NASA Technical Reports Server (NTRS), ERRORS, MASKS, PATENTS, Gender, Thomas K. [Inventor]

This thesis presents a frame work for a crew station handbook and includes samples of the broader areas which such a handbook should cover. The completed sections of this thesis serve as extensive treatments of the topics covered. The content of the individual sections of Chapters I and II varied with my experience and knowledge.
Topics: NASA Technical Reports Server (NTRS), CREW WORKSTATIONS, MANNED SPACECRAFT, HANDBOOKS, APOLLO...

Solar cells were made with a variety of base metal screen printing inks applied over silicon nitride AR coating and copper electroplated. Fritted and fritless nickel and fritless tin base printing inks were evaluated. Conversion efficiencies as high as 9% were observed with fritted nickel ink contacts, however, curve shapes were generally poor, reflecting high series resistance. Problems encountered in addition to high series reistance included loss of adhesion of the nickel contacts during...
Topics: NASA Technical Reports Server (NTRS), ELECTROPLATING, NICKEL, SILICON NITRIDES, SOLAR CELLS, TIN,...

This document presents general recommended standards for documenting scientific and technical information (STI) from a number of scientific and engineering disciplines. It is a companion publication to NASA SP-7084, "Grammar, Punctuation, and Capitalization: A Handbook for Technical Writers and Editors," and is intended primarily for STI personnel and publishing personnel within NASA and who support NASA STI publishing. Section 1 gives an overview of NASA STI publications. Section 2...
Topics: NASA Technical Reports Server (NTRS), DOCUMENTS, NASA PROGRAMS, REPORTS, STANDARDS, ABBREVIATIONS,...

Entries for approximately 4000 citations for the period May 1969 through December 1981 are listed. Subject, invention, source, number, and accession number indexes are included.
Topics: NASA Technical Reports Server (NTRS), NASA PROGRAMS, PATENT POLICY, INDEXES (DOCUMENTATION),...

This bibliography lists 382 reports, articles and other documents introduced into the NASA scientific and technical information system in June 1982.
Topics: NASA Technical Reports Server (NTRS), AERODYNAMICS, AERONAUTICAL ENGINEERING, AERONAUTICS, AIRCRAFT...

The bibliography lists 338 reports, articles and other documents introduced into the NASA scientific and technical information system in August 1982.
Topics: NASA Technical Reports Server (NTRS), AERODYNAMICS, AERONAUTICAL ENGINEERING, AERONAUTICS, AIRCRAFT...

During 5,000-year period from -1999 to +3000 (2000BCE to 3000CE), Earth will experience 11,898 eclipses of the Sun. The statistical distribution of eclipse types for this interval is as follows: 4,200 partial eclipses, 3956 annular eclipses, 3173 total eclipses,and 569 hybrid eclipses. Detailed global maps for each of the 11,898 eclipses delineate the geographic regions of visibility for both the penumbral (partial) and umbral or antumbral (total, annular, or hybrid) phases of every event....
Topics: NASA Technical Reports Server (NTRS), ECLIPSES, PENUMBRAS, STATISTICAL DISTRIBUTIONS, SUN, BORDERS,...

A modular design for combining piezoelectric transformers is provided for high voltage and high power conversion applications. The input portions of individual piezoelectric transformers are driven for a single power supply. This created the vibration and the conversion of electrical to electrical energy from the input to the output of the transformers. The output portions of the single piezoelectric transformers are combining in series and/or parallel to provide multiple outputs having...
Topics: NASA Technical Reports Server (NTRS), HIGH VOLTAGES, PIEZOELECTRICITY, SUPPLYING, TRANSFORMERS,...

The Institute for the Achievement of Human Potential developed a device known as the Vehicle for Initial Crawling (VIC); the acronym is a tribute to the crawler's inventor, Hubert "Vic" Vykukal; is an effective crawling aid. The VIC is used by brain injured children who are unable to crawl due to the problems of weight-bearing and friction, caused by gravity. It is a rounded plywood frame large enough to support the child's torso, leaving arms and legs free to move. On its underside...
Topics: NASA Technical Reports Server (NTRS), NEUROLOGY, LIMBS (ANATOMY), CHILDREN, LOCOMOTION, MEDICAL...

High density structural (blocking) materials composed of a polyimide filled with glass microballoons and methods for making such materials. Structural components such as panels which have integral edgings and/or other parts made of the high density materials.
Topics: NASA Technical Reports Server (NTRS), BLOCKING, GLASS, MICROBALLOONS, POLYIMIDES, PATENTS,...

In this paper, the authors review the FAA s current program investments and lay out a preliminary analytical framework to undertake projects that may address some of the noted deficiencies. By drawing upon the well developed theories from corporate finance, an analytical framework is offered that can be used for choosing FAA s investments taking into account risk, expected returns and inherent dependencies across NAS programs. The framework can be expanded into taking multiple assets and...
Topics: NASA Technical Reports Server (NTRS), AIRSPACE, ORGANIZATIONS, RISK, FINANCE, Bhadra, Dipasis,...

NASA s Exploration Systems Mission Directorate (ESMD) is implementing a management approach for modeling and simulation (M&S) that will provide decision-makers information on the model s fidelity, credibility, and quality, including the verification, validation and accreditation information. The NASA MSRR will be implemented leveraging M&S industry best practices. This presentation will discuss the requirements that will enable NASA to capture and make available the "meta...
Topics: NASA Technical Reports Server (NTRS), MANAGEMENT SYSTEMS, SIMULATION, ENGINEERING MANAGEMENT,...

The Communications Division at the NASA Glenn Research Center in Cleveland Ohio has as its charter to provide NASA and the Nation with our expertise and services in innovative communications technologies that address future missions in Aerospace Technology, Spaceflight, Space Science, Earth Science, Life Science and Exploration.
Topics: NASA Technical Reports Server (NTRS), TELECOMMUNICATION, SPACE FLIGHT, LIFE SCIENCES, EARTH...

The Spalart-Allmaras and the Menter SST kappa-omega turbulence models are shown to have the undesirable characteristic that, for fully turbulent computations, a transition region can occur whose extent varies with grid density. Extremely fine two-dimensional grids over the front portion of an airfoil are used to demonstrate the effect. As the grid density is increased, the laminar region near the nose becomes larger. In the Spalart-Allmaras model this behavior is due to convergence to a...
Topics: NASA Technical Reports Server (NTRS), TURBULENCE MODELS, CONVERGENCE, AIRFOILS, DEGENERATION,...

During Space Shuttle processing, discrepancies between vehicle dimensions and per print dimensions determine if a part should be refurbished, replaced or accepted "as-is." The engineer's job is to address each discrepancy by choosing the most accurate procedure and tool available, sometimes with up to ten thousands of an inch tolerance. Four methods of measurement are commonly used at the Kennedy Space Center: 1) caliper, 2) mold impressions, 3) optical comparator, 4) dial bore gage....
Topics: NASA Technical Reports Server (NTRS), MEASURING INSTRUMENTS, COMPARATORS, SPACE SHUTTLES,...

The geopositional accuracy of the standard geocorrected product from the Advanced Wide Field Sensor (AWiFS) was evaluated using digital orthophoto quarter quadrangles and other reference sources of similar accuracy. Images were analyzed from summer 2004 through spring 2005. Forty to fifty check points were collected manually per scene and analyzed to determine overall circular error, estimates of horizontal bias, and other systematic errors. Measured errors were somewhat higher than the...
Topics: NASA Technical Reports Server (NTRS), ERROR ANALYSIS, SYSTEMATIC ERRORS, ACCURACY, IMAGING...

A rotary regenerator disc matrix has a face seal with a cross arm and arcuate rim segments joined by prestress clamps to prestrain the arcuate rim seals so as to compensate seal rim twisting or coning and resultant disc face seal leakage as produced by operating thermal gradients across the seal.
Topics: NASA Technical Reports Server (NTRS), CLAMPS, CONICAL BODIES, PRESTRESSING, REGENERATORS, PATENTS,...

The configuration of the propulsion system engine externals must meet many airplane requirements such as cost, thrust, weight, range and systems power extraction. On the 737-700 several program requirements also played a major role in the development of the engine externals. These program goals were increased range, same cost as a 1994 737-300, 15% reduction in maintenance costs from the 737-300, and a propulsion package that appeared as if it was designed by one company. This presentation will...
Topics: NASA Technical Reports Server (NTRS), COST REDUCTION, MAINTENANCE, PROPULSION, THRUST, COSTS,...

A method of densifying an article formed of reaction bonded silicon nitride is disclosed. The reaction bonded silicon nitride article is packed in a packing mixture consisting of silicon nitride powder and a densification aid. The reaction bonded silicon nitride article and packing powder are sujected to a positive, low pressure nitrogen gas treatment while being heated to a treatment temperature and for a treatment time to cause any open porosity originally found in the reaction bonded silicon...
Topics: NASA Technical Reports Server (NTRS), DENSIFICATION, SILICON NITRIDES, POWDER (PARTICLES),...

The Mars Globe 20x is the first digitally produced raised relief globe to be sold at retail establishments. The rises and dips of the Martian landscape have been multiplied by 20 to make the shapes more noticeable to human touch and sight. They make this globe, with its over 1 million elevation points, a visually stunning introduction to the planet. Spectrum 3D used the NASA digital land elevation data to aim lasers that then shaped and defined the master globe s surface. Subsequent copies were...
Topics: NASA Technical Reports Server (NTRS), VISUAL PERCEPTION, MARS (PLANET), ELEVATION, TERRAIN, DIGITAL...

Preparing a vehicle and its payload for a single launch is a complex process that involves thousands of operations. Because the equipment and facilities required to carry out these operations are extremely expensive and limited in number, optimal assignment and efficient use are critically important. Overlapping missions that compete for the same resources, ground rules, safety requirements, and the unique needs of processing vehicles and payloads destined for space impose numerous constraints...
Topics: NASA Technical Reports Server (NTRS), SOFTWARE ENGINEERING, SCHEDULING, LAUNCHING, PAYLOADS,...

The overview begins with the bold vision for space exploration set out by President Bush in 2004. A brief description of the proposed systems architecture is presented along with an animation showing the various stages and phases of a mission. The overview concludes with latest roadmaps for the Upper Stage.
Topics: NASA Technical Reports Server (NTRS), ARCHITECTURE (COMPUTERS), LAUNCH VEHICLES, SPACE EXPLORATION,...

Consolidation of very fine silicon powder into shotted form using heated crucible.
Topics: NASA Technical Reports Server (NTRS), CONSOLIDATION, CRUCIBLES, POWDER (PARTICLES), PURITY,...

A miniature electrostatic ion thruster is proposed for maneuvering small spacecraft. In a thruster based on this concept, one or more propellant gases would be introduced into an ionizer based on the same principles as those of the device described in an earlier article, "Miniature Bipolar Electrostatic Ion Thruster". On the front side, positive ions leaving an ionizer element would be accelerated to high momentum by an electric field between the ionizer and an accelerator grid around...
Topics: NASA Technical Reports Server (NTRS), ION ENGINES, THRUSTORS, MICROSATELLITES, IONIZERS, Hartley,...

The present invention presents an optical encoder with increased conversion rates. Improvement in the conversion rate is a result of combining changes in the pattern recognition encoder's scale pattern with an image sensor readout technique which takes full advantage of those changes, and lends itself to operation by modern, high-speed, ultra-compact microprocessors and digital signal processors (DSP) or field programmable gate array (FPGA) logic elements which can process encoder scale images...
Topics: NASA Technical Reports Server (NTRS), CODERS, CODING, IMAGING TECHNIQUES, PATTERN RECOGNITION,...

This bibliography lists 362 reports, articles and other documents introduced into the NASA Scientific and Technical Information System in July 1982.
Topics: NASA Technical Reports Server (NTRS), AERODYNAMICS, AERONAUTICAL ENGINEERING, AERONAUTICS, AIRCRAFT...

A glossary of terms used in the Software Engineering Laboratory (SEL) is presented. The terms are defined within the context of the software development environment for flight dynamics at Goddard Space Flight Center. A concise reference for clarifying and understanding the language employed in SEL documents and data collection forms is provided.
Topics: NASA Technical Reports Server (NTRS), COMPUTER PROGRAMMING, FLIGHT MECHANICS, TERMINOLOGY, DATA...

Theodolite ring lights have been invented to ease a difficulty encountered in the well-established optical-metrology practice of using highly reflective spherical tooling balls as position references. A theodolite ring light produces a more easily visible reflection and eliminates the need for an autocollimating device. A theodolite ring light is a very bright light source that is well centered on the optical axis of the instrument. It can be fabricated, easily and inexpensively, for use on a...
Topics: NASA Technical Reports Server (NTRS), METROLOGY, THEODOLITES, OPTICAL MEASUREMENT, FABRICATION,...

A low-noise electrode suited for sensing electrocardiograms when chronically and subcutaneously implanted in a free-ranging subject. The electrode comprises a pocket-shaped electrically conductive member with a single entrance adapted to receive body fluids. The exterior of the member and the entrance region is coated with electrical insulation so that the only electrolyte/electrode interface is within the member remote from artifact-generating tissue. Cloth straps are bonded to the member to...
Topics: NASA Technical Reports Server (NTRS), DETECTION, ELECTROCARDIOGRAPHY, ELECTRODES, LOW NOISE,...

Developed by Goddard Space Flight Center and the Johns Hopkins University Applied Physics Laboratory to monitor the core body temperature of astronauts during space flight, the ingestible "thermometer pill" has a silicone-coated exterior, with a microbattery, a quartz crystal temperature sensor, a space-aged telemetry system, and microminiaturized circuitry on the interior.
Topics: NASA Technical Reports Server (NTRS), TEMPERATURE SENSORS, MICROMINIATURIZATION, ASTRONAUTS,...

Decelerator System Simulation (DSS) is a computer program for predicting and analyzing the dynamics of a load of cargo dropped with parachutes from an aircraft.
Topics: NASA Technical Reports Server (NTRS), COMPUTER PROGRAMS, PARACHUTES, SIMULATION, AIR DROP...

This Technical Memorandum (TM) presents formal NASA technical reports, papers published in technical journals, and presentations by Marshall Space Flight Center (MSFC) personnel FY 2004. It also includes papers of MSFC contractors. After being announced in STAR, all NASA series reports may be obtained from the National Technical Information Service, 5285 Port Royal Road, Springfield, VA 22161. The information in this TM maybe of value to the scientific and engineering community in determining...
Topics: NASA Technical Reports Server (NTRS), REPORTS, PRESENTATION, PAPERS, TECHNICAL WRITING, ABSTRACTS,...

one of the determining factors in the planet s ability to support life is the same factor that makes the Blue Planet blue: water. Therefore, NASA researchers have a focused interest in understanding Earth s oceans and their ability to continue sustaining life. A critical objective in this study is to understand the global processes that control the changes of carbon and associated living elements in the oceans. Since oceans are so large, one of the most widely used methods of this research is...
Topics: NASA Technical Reports Server (NTRS), OCEANS, REMOTE SENSING, SATELLITE IMAGERY, IMAGING...

This bibliography lists 418 reports, articles and other documents introduced into the NASA scientific and technical information system in May 1982.
Topics: NASA Technical Reports Server (NTRS), AERODYNAMICS, AERONAUTICAL ENGINEERING, AERONAUTICS, AIRCRAFT...

The technical feasibility of a solar thermal collector to provide process steam in an industrial environment was determined. The form of the experiment was an industrial field test.
Topics: NASA Technical Reports Server (NTRS), PROCESS HEAT, SOLAR COLLECTORS, STEAM, ENERGY CONVERSION,...

Non-solar compositional models of the troposphere of Jupiter, halide cloud condensation and volatile element inventories on Venus, and shock-wave processing of interstellar cloud materials are discussed.
Topics: NASA Technical Reports Server (NTRS), JUPITER (PLANET), PLANETARY ATMOSPHERES, VENUS (PLANET),...

The pulse-flow microencapsulation system (PFMS) is an automated system that continuously produces a stream of liquid-filled microcapsules for delivery of therapeutic agents to target tissues. Prior microencapsulation systems have relied on batch processes that involve transfer of batches between different apparatuses for different stages of production followed by sampling for acquisition of quality-control data, including measurements of size. In contrast, the PFMS is a single,...
Topics: NASA Technical Reports Server (NTRS), ENCAPSULATING, MICROMETERS, DRUGS, DOSAGE, PHARMACOLOGY,...

The plasma turbulence research program at William and Mary is discussed. The search has been less for phenomena to explain than for nontrivial magnetohydrodynamic processes in the fully turbulent domain that can be understood. Two examples are used to illustrate this: (1) development of anisotropy in the presence of a strong do magnetic field; and (2) the decay of an MHD turbulent field to a dynamically aligned state with velocity field and magnetic fields parallel or antiparallel.
Topics: NASA Technical Reports Server (NTRS), ANISOTROPY, PLASMA TURBULENCE, PLASMAS (PHYSICS), RESEARCH,...

An efficient search algorithm is described for the location of equilibrium states in a search set of states which differ from one another only by the choice of pure phases. The algorithm has three important characteristics: (1) it ignores states which have little prospect for being an improved approximation to the true equilibrium state; (2) it avoids states which lead to singular iteration equations; (3) it furnishes a search history which can provide clues to alternative search paths.
Topics: NASA Technical Reports Server (NTRS), EQUILIBRIUM METHODS, SEARCH PROFILES, THERMODYNAMICS,...

In FY05 the Exploration Systems Technology Maturation Program selected the JSC advanced mating systems development to continue as an in-house project. In FY06, as a result of ESAS Study (60 Day Study) the CEV Project (within the Constellation Program) has chosen to continue the project as a GFE Flight Hardware development effort. New requirement for CEV to travel and dock with the ISS in 2011/12 in support of retiring the Shuttle and reducing the gap of time where US does not have any US based...
Topics: NASA Technical Reports Server (NTRS), DOCKING, SYSTEMS ENGINEERING, CONSTELLATIONS, RISK, SEALS...

A viewgraph presentation on the development of space exploration through a framework of the European Space Policy is shown. The topics include: 1) Europe's Involvement in Space Exploration; 2) Different Programs-Similar Goals; 3) International Cooperation; and 4) Establishing an International Cooperation Framework.
Topics: NASA Technical Reports Server (NTRS), SPACE EXPLORATION, EUROPEAN SPACE AGENCY, INTERNATIONAL...

The presence of an older plagioclase-rich basalt and a younger olivine-rich basalt were confirmed by modal and chemical analysis. Chemical analysis also confirmed the presence of flows that are tholeiitic in composition and could be remnants of an original tholeittic parent magma. Eruptions from different levels of a differentiated magma chamber are proposed to account for the two members.
Topics: NASA Technical Reports Server (NTRS), BASALT, CHEMICAL ANALYSIS, OLIVINE, GEOLOGICAL SURVEYS,...